1.
Acta Crystallogr B
; 56 (Pt 6): 947-52, 2000 Dec.
Article
in English
| MEDLINE
| ID: mdl-11099959
ABSTRACT
The crystal structure of a radiation-damaged natural zircon, ZrSiO(4) (alpha-decay radiation dose is ca 1.8 x 10(18) alpha-decay events g(-1)), has been determined. The anisotropic unit-cell swelling observed in the early stages of the amorphization process (0.17% along the a axis and 0.62% along the c axis compared with the undamaged material) is a consequence of the anisotropy of the expansion of ZrO(8) polyhedra. Larger anisotropic displacement parameters were found for Zr and O atoms, indicating that the distortion produced by alpha particle-induced localized defects mainly affects the ZrO(8) unit. The overall shape of SiO(4) tetrahedra remains essentially undistorted, while Si-O bonds are found to lengthen by 0.43%.
2.
Phys Rev B Condens Matter
; 52(21): 15582-15591, 1995 Dec 01.
Article
in English
| MEDLINE
| ID: mdl-9980919